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Operation Manual / Power2 550-M / High-pressure stage
3 Removal and installation / 3.2 Removing the high-pressure stage
© Copyright 2022 ABB. All rights reserved.
HZTL4058_EN
Rev.F
March 2022
3.2
Removing the high-pressure stage
Preparing for removal
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Disconnect all pipes according to the instructions of the enginebuilder.
Fig. 13: Removing the high-pressure stage
1. Loosen screws (72013) between bellows (82300) and compressor casing (72000) and re-
move with washer (72014). The air suction branch (82000) with the bellows does not have
to be dismantled from the air line. To protect the bellows, the high-pressure stage must
not be lifted up together with the radial air suction branch and the bellows.
2. If present: Unplug the plug to the speed sensor (86505) and secure the rolled-up
cable (2 m) to the high-pressure stage. This protects the plug from being crushed.
3. Treat the threads of the threaded rods (42191) and fixing screws (02) of the sup-
port (61300) with penetrating oil and allow it to take effect. Do not oil the pressure
screws of the clamping nut (42201).
4. Attach lifting gear to high-pressure stage with two swivel lifting eyes (03).
5. Loosen and remove the fixing screws (02) of the support (61300).
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Loosen the clamping nuts (42201) in accordance with the following section.
Loosening the clamping nut
CAUTION
Incorrect procedure can make loosening impossible
If individual pressure screws are fully relieved, the pressure screws can be-
come compressed, making it impossible to loosen them.
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Comply with the following steps for loosening the pressure screws.
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